<template>
  <div class="wrapper">
    <!-- header部分 -->
    <header>
      <p>商家列表</p>
    </header>

    <!-- 商家列表部分 -->
    <ul class="business">
      <li
        v-for="item in businessArr"
        @click="toBusinessInfo(item.businessId)"
        :key="item.businessId"
      >
        <div class="business-img">
          <img :src="item.businessImg" />
          <div class="business-img-quantity" v-show="item.quantity>0">{{item.quantity}}</div>
        </div>
        <div class="business-info">
          <h3>{{item.businessName}}</h3>
          <p>&#165;{{item.starPrice}} 起送 | &#165; {{item.deliveryPrice}} 配送</p>
          <p>{{item.businessExplain}}</p>
        </div>
      </li>
    </ul>

    <!-- 底部菜单部分 -->
    <Footer></Footer>
  </div>
</template>

<script>
import Footer from "../components/Footer.vue";

export default {
  name: "BusinessList",
  data() {
    return {
      orderTypeId: this.$route.query.orderTypeId,
      businessArr: [],
      user: {},
    };
  },
  created() {
    this.user = this.$getSessionStorage("user");
    //根据orderTypeId查询商家
    this.$axios
      .post(
        "BusinessCtrl/listBusinessByOrderTypeId",
        this.$qs.stringify({ orderTypeId: this.orderTypeId })
      )
      .then((response) => {
        this.businessArr = response.data;
        //先判断是不是登录了,决定是否显示购物车
        if (this.user != null) {
          this.listCart();
        }
      })
      .catch((value) => {
        console.error(value);
      });
  },
  components: {
    Footer,
  },
  methods: {
    listCart() {
      this.$axios
        .post("cart/listCart", this.$qs.stringify({ userId: this.user.userId }))
        .then((responese) => {
          let cartArr = responese.data;
          //遍历所有列表
          for (let businessItem of this.businessArr) {
            businessItem.quantity = 0;
            for (let cartItem of cartArr) {
              if (cartItem.businessId == businessItem.businessId) {
                businessItem.quantity += cartItem.quantity;
              }
            }
          }
          this.businessArr.sort();
        })
        .catch((value) => {
          console.error(value);
        });
    },
    //进入到某个商家的详细信息中
    toBusinessInfo(businessId) {
      this.$router.push({
        path: "/businessInfo",
        query: { businessId: businessId },
      });
    },
  },
};
</script>

<style scoped>
/****************** 总容器 ******************/
.wrapper {
  width: 100%;
  height: 100%;
}

/****************** header部分 ******************/
.wrapper header {
  width: 100%;
  height: 12vw;
  background-color: #0097ff;
  color: #fff;
  font-size: 4.8vw;

  position: fixed;
  left: 0;
  top: 0;
  z-index: 1000;

  display: flex;
  justify-content: center;
  align-items: center;
}

/****************** 商家列表部分 ******************/
.wrapper .business {
  width: 100%;
  margin-top: 12vw;
  margin-bottom: 14vw;
}

.wrapper .business li {
  width: 100%;
  box-sizing: border-box;
  padding: 2.5vw;
  border-bottom: solid 1px #ddd;
  user-select: none;
  cursor: pointer;

  display: flex;
  align-items: center;
}

.wrapper .business li .business-img {
  /*这里设置为相当定位，成为business-img-quantity元素的父元素*/
  position: relative;
}

.wrapper .business li .business-img img {
  width: 20vw;
  height: 20vw;
}

.wrapper .business li .business-img .business-img-quantity {
  width: 5vw;
  height: 5vw;
  background-color: red;
  color: #fff;
  font-size: 3.6vw;
  border-radius: 2.5vw;

  display: flex;
  justify-content: center;
  align-items: center;

  /*设置成绝对定位，不占文档流空间*/
  position: absolute;
  right: -1.5vw;
  top: -1.5vw;
}

.wrapper .business li .business-info {
  margin-left: 3vw;
}

.wrapper .business li .business-info h3 {
  font-size: 3.8vw;
  color: #555;
}

.wrapper .business li .business-info p {
  font-size: 3vw;
  color: #888;
  margin-top: 2vw;
}
</style>
